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Ev Archive for November 1998
1519 messages, last added Wed Aug 08 18:43:37 2001

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Re: ultracapacitors in AC drives




	*** The point I wanted to make was this: Given a UC rated to hold,
say `x' Ah of charge for `t' minutes, if it loses `x/2' Ah within a much
shorter time period than `t', isn't the rating wrong? I was not referring
to the rate of discharge. I thought the rating would be for how long it
could hold a substantial proportion (say, >90%) of the original charge.***

On Mon, 30 Nov 1998, LEE A HART wrote:
<snip>
> Peter VanDerWal did an excellent job of explaining it via the water bucket
> with a leak analogy. Capacitors leak fastest when they are full.
> 
> Applying the same logic, a battery is more like an open-topped bucket. It
<snip>

			========================
			     R SUBRAMANIAN
			M. TECH (ENERGY SYSTEMS)
			    H-1, ROOM NO. 27
		  http://www.me.iitb.ernet.in/~subram
			========================
		He fights...with passion - "Braveheart"